35.8.7.9 Synchronization Busy
| Symbol | Description | Symbol | Description | Symbol | Description |
|---|---|---|---|---|---|
| R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
| W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
| K | Write to clear | S | Software settable bit | — | — |
| Name: | SYNCBUSY |
| Offset: | 0x1C |
| Reset: | 0x00000000 |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| Access | |||||||||
| Reset |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| SYSOP | ENABLE | SWRST | |||||||
| Access | R | R | R | ||||||
| Reset | 0 | 0 | 0 |
Bit 2 – SYSOP System Operation Synchronization Busy
Writing CTRLB.CMD, STATUS.BUSSTATE, ADDR, or DATA when the SERCOM is enabled requires synchronization.
Writing CTRLB.FIFOCLR when the SERCOM is enabled and Smart Mode is enabled requires synchronization. When written, the SYNCBUSY.SYSOP bit will be set until synchronization is complete.
| Value | Description |
|---|---|
| 0 | System operation synchronization is not busy. |
| 1 | System operation synchronization is busy. |
Bit 1 – ENABLE SERCOM Enable Synchronization Busy
Enabling and disabling the SERCOM (CTRLA.ENABLE) requires synchronization. When written, the SYNCBUSY.ENABLE bit will be set until synchronization is complete.
| Value | Description |
|---|---|
| 0 | Enable synchronization is not busy. |
| 1 | Enable synchronization is busy. |
Bit 0 – SWRST Software Reset Synchronization Busy
Resetting the SERCOM (CTRLA.SWRST) requires synchronization. When written, the SYNCBUSY.SWRST bit will be set until synchronization is complete.
| Value | Description |
|---|---|
| 0 | SWRST synchronization is not busy. |
| 1 | SWRST synchronization is busy. |